Nous prouvons le résultat suivant : si un graphe biparti n’est pas un graphe de cordes, alors son complément n’est pas un graphe de cordes. La preuve fait appel à une caractérisation des graphes de cordes par Naji, qui utilise un système d’équations linéaires sur le corps à deux éléments.
À la fin de cette note je rappelle brièvement le travail de François Jaeger sur les graphes de cordes.
The following result is proved: if a bipartite graph is not a circle graph, then its complement is not a circle graph. The proof uses Naji’s characterization of circle graphs by means of a linear system of equations with unknowns in .
At the end of this short note I briefly recall the work of François Jaeger on circle graphs.
@article{AIF_1999__49_3_809_0, author = {Bouchet, Andr\'e}, title = {Bipartite graphs that are not circle graphs}, journal = {Annales de l'Institut Fourier}, volume = {49}, year = {1999}, pages = {809-814}, doi = {10.5802/aif.1693}, mrnumber = {2000g:05127}, zbl = {0917.05064}, language = {en}, url = {http://dml.mathdoc.fr/item/AIF_1999__49_3_809_0} }
Bouchet, André. Bipartite graphs that are not circle graphs. Annales de l'Institut Fourier, Tome 49 (1999) pp. 809-814. doi : 10.5802/aif.1693. http://gdmltest.u-ga.fr/item/AIF_1999__49_3_809_0/
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